Is there evidence for a 4.2 ka BP event in the northern North Atlantic region?

Type Article
Date 2019
Language English
Author(s) Bradley Raymond1, Bakke Jostein2
Affiliation(s) 1 : Department of Geosciences/Climate System Research Center, University of Massachusetts, Amherst, USA
2 : Department of Earth Science/Bjerknes Centre for Climate Research, University of Bergen, Norway
Source Climate of the Past (1814-9324) (Copernicus GmbH), 2019 , Vol. 15 , N. 5 , P. 1665-1676
DOI 10.5194/cp-2018-162
Note Special issue The 4.2 ka BP climatic event Editor(s): D.-D. Rousseau, G. Zanchetta, H. Weiss, M. Bini, and R.S. Bradley
Abstract

We review paleoceanographic and paleoclimatic records from the northern North Atlantic to assess the nature of climatic conditions at 4.2 ka BP, which has been identified as a time of exceptional climatic anomalies in many parts of the world. The northern North Atlantic region experienced relatively warm conditions in the early Holocene (6–8 ka BP) followed by a general decline in temperatures after ~ 5 ka BP, which led to the onset of Neoglaciation. Although a few records do show a distinct anomaly around 4.2 ka BP (associated with a glacial advance), this is not widespread and we interpret it as a local manifestation of the overall climatic deterioration that characterizes the late Holocene.

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